Growth and Development!

1. Growth and Development! By Jamie Pelow, Kelvin Cosgrave and Max Challenger!

2. The process occurs mostly in the female reproductive system, the vagina/ fallopian tubes/ uterus. Some of the process comes from the male reproductive system, the sperm to fertilize the egg. The fertilization process occurs usually when a couple wants to bring a child into the world. Or when single mother want a baby they go to doctors to get a sperm donor so they can raise/care for the baby for them selves. The fertilization process is very important because with out it the human spices would go extinct. We use it to reproduce and bring children into the world to live and reproduce (female) or provide sperm to reproduce (male). To continue the human life cycle. Fertilization!

3. The process of fertilization is quiet simple, the very first step is for the sperm has to injected into the woman (baby carrier), next the millions of sperm are in the vagina on the hunt for a egg (ovum). At travels through the cervix, then enters the uterus (the womb). After the sperm cells journey through the fallopian tube, soon they reach the egg witch has been set free from the ovary and is waiting to be fertilized. All sperm cells that reach the egg will fiercely try and puncture the ovum's wall (membrane). Only one sperm will be able to infiltrate the egg. The sperm is only half a life, the eggs is the other half you need both to successfully create a new life. It will now travel from the fallopian tube to the uterus. For 9 months the eggs with stay there and develop a life of a baby! Fertilization, Process!

4. Menstruation is the term given to the periodic discharge of blood, tissue, fluid and mucus from reproductive organs in females. Menstruation usually lasts from 3-6 days every month. It is caused by a sudden reduction in the hormone estrogen and progesterone. The menstrual cycle occurs in the uterus in the woman's abdomen. When periods (menstruation’s) come regularly, this is called the menstrual cycle. The Menstrual Cycle/Ovulation A regular menstrual cycle means that important parts of your body are working correctly. The menstrual cycle gives women important body chemicals, called hormones, to keep them healthy. It also prepares your body for pregnancy each month.

5. How it occurs: Spermatogenesis is a process the male primary germ cells go through, and produce a number of cells called the spermatogonia, which the primary spermatocytes are derived. Each primary spermatocyte divides into two secondary spermatocytes, and each secondary spermatocyte into two spermatids or into young spermatozoa. These develop into mature spermatozoa, also called sperm cells. The primary spermatocyte gives rise to two cells, the secondary spermatocytes, and the two secondary spermatocytes by their subdivision produce four spermatozoa. Spermatogenesis Where it occurs: It occurs in the male testes and epididymis in a specific order, and it takes approximately 64 days. Spermatogenesis takes place within several structures of the male reproductive system. The initial stages occur within the testes and progress to the epididymis where the developing gametes mature and are stored until ejaculation. The seminiferous tubules of the testes are the starting point for the process, where stem cells adjacent to the inner tubule wall divide in a centripetal direction—beginning at the walls and proceeding into the innermost part, or lumen—to produce immature sperm. Maturation occurs in the epididymis and involves the acquisition of a tail and hence motility.

6. Why it’s important: Spermatogenesis is highly dependent upon optimal conditions for the process to occur correctly, and it is essential for sexual reproduction. When it occurs: It starts at puberty and usually continues uninterrupted until death, although a slight decrease can be found in the quantity of produced sperm with increase in age. The entire process can be broken up into several distinct stages, each corresponding to a particular type of cell. Spermatogenesis What is the process: The process is the sperm production in the testes,

7. http://www.menstruation.com.au/periodpages/menstrualcycles.htmlhttp://www.menstruation.com.au/periodpages/menstrualcycles.html http://www.womenshealth.gov/faq/menstruation.cfm Bibliography http://deerparkhpe.wikispaces.com/7-1+HEALTH+2010-11